Induction-motor.



J. E. WEBSTER.

I INDUCTION MOTOR. APPLIOATION FILED JULY 6, 1908.

971,649. Patented 0011.4,1910.

2 sumksnm 1.

iwnmassisr g 111mm I ZWM a Q g i ATiT0RNEY-- J. E. WEBS'IER.v

INDUCTION MOTOR. APPLICATION FILED JULY e; 1908.

971,649. Patented 0012.4,1910.

2 SHEETS-SHEET INVENTOR WITNESSES:

v ATTORNEY UNITEE STATES PATENT OFFICE. 1" JOHN E. WEBSTER, 0FQITTSB'URG; PENNSYLVANI A, ASSIGNDR, BY MESNE ASSIGN- MENTS, T0WESTINGHOUSE ELECTRIG & MANUFACTURING COMPANY, OF EAST PITTSBUEG,?ENNSYLVANIA, A CORPORATION OF PENNSYLVANIA.

INDUCTIDN-MO'EOR.

Specification 01 Letters Patent. Patented Get. 4, 1910.

Application filed July 6, 1908.

To all whom it may concern:

Be it known that I, JOHN E. W'nnsrnn, a citizen of the United States,and a resident of Pittsburg, in the county of Allegheny and State ofPennsylvania, have invented a new and useful Improvement in Induction-Motors, of which the following is a specification.

My invention relates to induction motors, and particularly to thesecondary members thereof, and it has for its object to provide asecondary member of exceptionally simple and economical construction.

igure l of the accompanying drawings is a View in longitudinal verticalsection of a portion of the secondary member of a motor constructed inaccordance with the present invention. Fig. 2 is a view in end elevationof a portion of the member shown in Fig. 1. ig. 3 is a view, in endelevation, of a portion of the secondary member of a motor embodying a.modification of the invention. Fig. at is a view in longitudinalvertical section of a port-ion of the secondary member of a motorembodying another modification of the invention, and Fig. 5 is a view inend elevation of a in Fig. 4;. j

The laminated core member 1 of an indu tion motor is provided withperipheral slots to receive conducting bars 2 which project beyond theends thereof, and between the projecting ends are located conductingblocks 3 of keystone form, the said blocks and projectin ends beingpreferably tinned before assemb ing. Closely applied over the blocks 3and the projecting ends of the bars- 2 is a band 4 consisting of aplurality of con- Volutions of wire, preferably of steel, the band beingemployed for the purpose of clamping and maintaining the blocks and theconducting bars in intimate engagement. One of the blocks may besomewhat shorter than the others, as indicated at 5, in order that theends of the band wire may be bent inwardly between the adjacent bars andsecured to the inner face 6 of one 01? them by means of screws '1. Aftertheparts are all assembled, as shown, solder may be applied to theblocks and the projecting ends of the bars for the purpose of improvingthe elec-' trical connections between them and for inportion of themember shown Serial No. 442,205.

the mechanical strength of the made of keystone form in cross section,as

illustrated in Figs 4.- and 5.

I desire it to be understood that my invention is not limited to barsand blocks of any specific form or forms in cross-section, but it is, ofcourse, desirable that the said parts should be of such form as toprovide a rigid structure and good electrical contact between adjacentsurfaces.

I claim as my'invention:

1 In a dynamo-electric machine, the combination with a core member, andconducting bars extending through and beyond its ends, of conductingblocks secured between the projecting ends of the bars;

2. In a dynamoele'ctric machine, the combination with a core member, andconduct-.v ing bars extending through and beyond the ends of the coremember, of conducting blocks between the projecting ends of the bars,and a band surrounding the blocks and the ends of the bars.

3. In a dynamo-electric machine, the combination with a core member, andconductingbars extending through and beyond its ends, of conductingblocks between the projectin ends of the bars, and a plurality ofconvoIutions of wire surrounding the blocks and the ends of the bars.

4. In a dynamo-electric machine, the combination with a core member, andconducting bars extending through and beyond its ends, of conductingblocks between the projecting ends of the bars, a plurality ofconvolutions of wire surrounding the blocks and the ends of the bars,and means for securing the ends of the wire to one of the bars.

5. In a dynamo-electric machine, the combination wlth a core member, andconductblocks clamped between the ends of said ing bars extendingthrough and beyond its bars. ends, of conducting blocks secured betweeni 5 the bars and provided With internally probination with a slottedCore, of conducting jecting vanes. bars located in the core slots, andconduct.- 6. In adynamo-electric machine, the coming blocks clampedbetween the ends of said 'bination With a core member, and conductbarsand soldered thereto to form a con ing bars extending through and beyondits ducting ring.

1o ends, of conducting blocks located between In testimony whereof, Ihave hereunto Tthe projecting ends of the bars and provided subscribedmy name this 2nd day of July,

with internally projeeting vanes, and a, band 1908.

' surrounding the blocks 'and the ends of the JOHN E. WEBSTER.

bars. Witnesses 5 v 7. In a dynamo-electric machine, the com- VERYLBROUGHTON,

binatlon with a slotted core, of conducting BIRNEY Hmns.

bars located in the core slots, and conducting 8. In a dynamo-electricmachine, the (30111-

